Dressing tool



Feb 126 193 5. I c. E. PIOCH 1,992,768

- DRESSING TOOL Filed May 8, 1933 mwll INVENTOR Carl 2;. Pioc ATTORNEYS.

Patented Feb. 26,- 1935 UNITED STATES.

DRESSING TOOL Carl E. Pioch, Detroit, Mich, asslgnor to Wheel Trueing Tool Co. of of Delaware- Application May 8, 1

4 Claims.

My invention relates to dressing tools and particularly to a dressing tool having extremely flexible adjustment in which any side of the dress-. ing element may bedisposed at any point in a semi-sphere described about said element.

It has been the practice in the past to mount a diamond or similar dressing element in a shank and to construct a support which retained the shank in a desirable angular relation to a stone to be dressed. For each particular dressing 01!);

the support about its axis, the rotation of an intermediate member normal to said axis, and the rotation of the supporting nib of the diamond or dressing element normal to the rotation of the intermediate member. Clamping means are provided for the support, the member and the nib to retain them in firm fixed relation. In this construction the diamond or element may be disposed at any point in a semi-sphere described about the nib and any shoulder of the diamond may be disposed relative to the work at any point in the semisphere. An arcuate shape shoulder is-provided on the support to be engaged by a spherical surface on the intermediate member to produce rigidity to the holder and to retain the elements infirm fixed relation.

Accordingly, the main objects of my invention are to provide a holder for a dressing element which is so constructed that any side of the element may be disposed in any point in a semisphere described about the elements; to provide 45 complete universal movement to the holder so that the dressing element may be disposed in a semisphere described about the elements; to provide a supportingmemb'er which is rotatable about its axis and an intermediate member rotatable about its axis normal to the axis of the supporting member having means for supporting a nib which is likewise rotatableabout its axis to provide complete, universal movement of the dressing ele-.

'ment; to provide clamping means for the various elements of the holder so thatthey may be Delaware, a corporation 933, Serial No. 689,821

retained in fixed position after adjustment; and, in general, to provide a holder for a dressing element which'is unique in construction, which is completely flexible in adiustment and which is a. material advancement'in the art.

Other objects and features of novelty of my invention will be either specifically pointed "out or will become apparent when referring, for a better understanding of my invention, to the following description taken in conjunction with the 10 accompanying drawing, wherein:

Figure 1 is a plan view of a dressing tool holder embodying features of my invention,

. Fig. 2 is 'a view in elevation of the structure illustrated in Fig. 1 v

Fig. 3 is an exploded view, partly in section of v the structure illustrated in Fig. 2,

I Fig. 4 is a plan view of a dressing tool holder similar to that illustrated in Fig. 1, showing a modified form thereof,

Fig. 5 is a sectional view of the structure illustrated in Fig. 4, taken on the line 5-5 thereof,

and

Fig. 6 is an exploded view of the structure illustrated in Fig. 4.

Referring to Figs. 1, 2 and 3, I have illustrated the tool holder 10 as comprising a supporting member 11 having a; shank 12 which is received by an'aperture 13 in an arbor 14 andlocked in desired position by a suitable clamping screw 15. The vbody portion 16 of the-support 11 forms a shoulder for the shank 12 and is recessed at 17 to form an arcuate surface which is engaged by an arcuate surface 18 on the intermediate mem ber 19 01 the holder.

An aperture 21 is provided in the body portion' of the supporting portion 16 of the holder in which a shank 22- on the intermediate member 19 is disposed to have the surface '18 mate with the surface 17 of the supporting portion. A clamping screw 23 retains the intermediate member 19 in fixed relation to the supporting member 11. An aperture 24-is provided in the intermediate member 19, normal to the shank 22, for receiving a shank 25 of a nib 26 in which a diamond or other suitable dressing element 2'7 is supported. A clamping screw 28 is employed for clamping the shank 25 in the member 19. It is to be understood that any other type of clamping meansknown in the art to be suitable may be employed in place of the screw herein shown.

As illustrated in Fig. 1, the ,nib 26 may be 1 adjusted at any angle'to the work and at the same time be rotated to present a shoulder of the element 2'? which is parallel to the cleavage through 360 about the axis of the shank 12,

it may be disposed in any'point in a semisphere and, since the nib is rotatably mounted about its axis in the member 19, any side of the diamond or element 27 may be disposed in the semisphere so described. Accordingly, complete adjustment is provided by the holder 10, first in disposing the dressing element at any point in a semisphere and second by permitting any side of the element to be disposed relative to the work at any point in the semisphere. Th'e nib 26 is clamped in the member 19 and thereafter the member 19 is swung about the axis of the shank 22 and clamped in any position. In this manner the clamping element 28, as illustrated in Fig. 2, may beldisposed in an unaccessible position in the face 17 of the body portion 11 after clamping the shank 25 in themember 19.

Referring to Figs. 4, 5 and 6, I have shown a modified form of the structure illustrated in Figs. 1, 2 and 3, wherein the member 19 has the aperture 24 eliminated and a second shank .30 provided normal to the shank 22. A nib 31 is provided having a recess 32 in which the shank is received, after which suitable clamping means 33, provided on the nib, retains the nib in firm, fixed relation to the shank 30. The operation of the holder is exactly the same as that in regard to the structure illustrated in Figs. 1, 2 and 3 and will, therefore, not be herein repeated. As in the prior construction, any side of the nib 31 may be disposed in the semisphere described about the element 27 in view of the rotation of the nib about the axis of the shank 30, the rotation of the member 19 about the axis of the shank 22, and the rotation of the support 11 about the axis of the shank 12.

It will thus be seen that I have provided a holder for a dressing element which is completely universal in movement, being so constructed that the element may be disposed inany point in a semisphere described aboutthe' element and further flexible to have any side or the element itself disposed atany point in the semisphere. Any mode of dressing may readily be accomplished by the holder without requiring special adapters as has been employed heretofore in the art. By havingfany side of the element disposable at the point desired, the cutting may always be effected against the cleavage grain of the ele-- ment rather than normal thereto which elimthe chipping and the rapid deterioration of the element. Accordingly, the holder not only simplifies the adjustment of the element relative to the member to be dressed, but also is the main factor in increasing the life of the dressing element by making it possible to expose a shoulder, normal to the cleavage grain of the element, to the stone to be dressed to prevent the element from being chipped and rapidly destroyed.

While I have described and illustrated but two embodiments of my invention, it will be apparent to those skilled in the art that various changes, omissions, additions and substitutions may be made therein without departing from the spirit and scope of my invention, as set forth in the accompanying claims.

I claim as my invention:

1. A dressing tool for a grinding stone including, in combination, a support mounted for rotation about its axis and provided with an arcuate shoulder and an aperture normal to said axis, a member having a shank and an arcuate body portion mated respectively with said aperture and shoulder, and a dressing element mounted for rotational movement about its axis on the side of said member opposite to said side in engagement with said shoulder.

2. A dressing tool for a grinding stone including, in combination, a support mounted for ro-.

tation about its axis and provided with an arcuate shoulder and an aperture normal to said axis, a member having a shank and an arcuate body portion mated respectively with said aperture and shoulder, a dressing element mounted for rotational movement about itsaxis on the side of said member opposite to said side in engagement with said shoulder, and clamping means for retaining the support, the member and the element in fixed relation.

3. A dressing tool for a grinding stone including, in combination, a support mounted for rotation about its axis and provided with a shoul' tation about its axis and provided with a shoulder and an oifset extension having an perture, a member provided with a shank and a arcuate body portion mated respectively with said aperture and shoulder, said body portion being providedwith an aperture normal to said shank, a dressing element having a shank disposed in said aperture and rotatable axially, and clamping means for securing said element and member to each other and to said support.

j CARL E. moon. 

